Patent GB-190702089-A (GB)
Title: Improvements in Lubricators.
Inventor: CHAPMAN LEONARD
Filed: 1907-01-28
Granted: 1907-04-11
Abstract: 2089. Chapman, L. Jan. 28. Lubricators.-In a lubricator of the kind in which liquid or semi-solid lubricant is forced from a cylinder by a plunger operated by worm and ratchet gearing, the plunger 3, Fig. 1, is forced upwards through a stuffing-box 2 into a cylinder 1, which has an open top closed by a cover 6 pressed down by a screw 7 and handle 8. The arms 10, supporting the bar 9 in which the screw 7 works, are pivoted to the sides of the cylinder so that the cover may be swung to one side for filling or inspecting the cylinder. The plunger 3 is actuated by a screw 12 working in a nut 13, which is prevented from turning by a lug 14 engaging a vertical rib 15 on the main casting. When the lug 14 has passed the top of the rib 15, the nut is free to turn and the upward motion of the plunger ceases. The screw 12 is supported by a ball bearing and is actuated by bevel-wheels 20, 23, the latter being mounted on an inclined shaft 24, carrying at its upper end a hand-wheel 25 and a worm-wheel 26 gearing with a worm 27 on an horizontal shaft 28. A pin 30, mounted in the hand-wheel, engages one of a series of holes 32 in the worm-wheel, but may be drawn out of engagement against the spring 31, and retained by a stop-pin 34 when turned out of line with the slot 35. The shafts 28, and the worm gearing are enclosed in a casing 40, forming a dust-proof oil-bath. A sleeve 43, enclosing the shaft 24, has a spherical boss 44 engaging a vertical hole 45 in the base. The shaft 28 is actuated by an oscillating lever 49 by means of ratchet gearing of the kind described in Specification No. 14,441, A.D. 1903, comprising three disks 46, 47, 48, Fig. 2, of which the middle one is fast and the two outer ones are loose on the shaft. Recesses in the disks contain coiled springs 54, 55, of opposite hand, which allow the disks to slip in one direction but grip in the other direction with a ratchet action. To vary the throw of this ratchet device, a fan-shaped recess 50, Figs. 1 and 3, is formed in the disk 48, and is engaged by a bolt 52 which can be adjusted and tightened at varying distances from the shaft 28 by a hand wrench-nut 53. When the bolt is adjusted at the outer end of the slot 50, the three disks are free to swing together without doing any work, and when the bolt is at the apex of the slot 50, the disk 48 is held fast and the whole throw of the lever 49 is communicated to the shaft 28. In intermediate positions of the bolt 52, a portion only of the throw of the lever 49 is operative. To enable the lubricator to be driven by a belt from a crank-shaft, the lever 49 may be actuated by a connecting-rod 61, Fig. 3, and crank-disk 59 on a shaft 56 carrying a hollow driving-pulley 63, within which is arranged an epicyclic reducing train, consisting of two pinions 64, 65 of different diameters mounted on a bolt 66 and engaging respectively a toothed wheel 67 keyed to the shaft 56, and a fixed wheel 68 having a long boss bored to serve as a bearing for the shaft 56. The weight of the pinions is counterbalanced by a weight 69 on a bolt 70. Specification No. 11,531, A.D. 1895, is referred to.